using MediatR;
using Microsoft.Extensions.Logging;
using ReC.Application.RecActions.Queries;

namespace ReC.Application.RecActions.Commands;

public record InvokeBatchRecActionsCommand : ReadRecActionQueryBase, IRequest;

public static class InvokeBatchRecActionsCommandExtensions
{
    public static Task InvokeBatchRecAction(this ISender sender, int profileId)
        => sender.Send(new InvokeBatchRecActionsCommand { ProfileId = profileId });
}

public class InvokeRecActionsCommandHandler(ISender sender, IHttpClientFactory clientFactory, ILogger<InvokeRecActionsCommandHandler>? logger = null) : IRequestHandler<InvokeBatchRecActionsCommand>
{
    public async Task Handle(InvokeBatchRecActionsCommand request, CancellationToken cancel)
    {
        var actions = await sender.Send(request.ToReadQuery(), cancel);

        var http = clientFactory.CreateClient();

        using var semaphore = new SemaphoreSlim(5);

        var tasks = actions.Select(async action =>
        {
            await semaphore.WaitAsync(cancel);
            try
            {
              await sender.Send(action.ToInvokeCommand(), cancel);
            }
            catch(Exception ex)
            {
                logger?.LogError(
                    ex,
                    "Error invoking Rec action. ProfileId: {ProfileId}, Id: {Id}",
                    action.ProfileId,
                    action.Id
                );
            }
            finally
            {
                semaphore.Release();
            }
        });

        await Task.WhenAll(tasks);
    }
}